2123942261 has 8 divisors (see below), whose sum is σ = 2427849600. Its totient is φ = 1820156688.

The previous prime is 2123942257. The next prime is 2123942263. The reversal of 2123942261 is 1622493212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123942261 - 2² = 2123942257 is a prime.

It is a super-2 number, since 2×2123942261² = 9022261456123584242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123942263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10640 + ... + 66038.

It is an arithmetic number, because the mean of its divisors is an integer number (303481200).

Almost surely, 2^2123942261 is an apocalyptic number.

It is an amenable number.

2123942261 is a deficient number, since it is larger than the sum of its proper divisors (303907339).

2123942261 is an equidigital number, since it uses as much as digits as its factorization.

2123942261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60883.

The product of its digits is 10368, while the sum is 32.

The square root of 2123942261 is about 46086.2480681602. The cubic root of 2123942261 is about 1285.4274466073.

The spelling of 2123942261 in words is "two billion, one hundred twenty-three million, nine hundred forty-two thousand, two hundred sixty-one".